Back scratching device



FIG. 1 is a front elevational view of a back scratching device showing my new design;

FIG. 2 is a rear elevational view of the back scratching device;

FIG. 3 is a side elevational view of the back scratching device; and,

FIG. 4 is a top plan view of the back scratching device, the opposite side view being a mirror image thereof. 

CLAIM The ornamental design for a back scratching device, as shown and described. 